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Systematic sampling or cluster sampling

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(a) Suppose you travel from your home to the university by bus. The bus stops at your doorstep and in front of the university. The bus time table shows the travelling time is 42 minutes. You recorded your travelling time during the last 5 trips and the average time was 39 minutes. Identify each of the values 42 and 39 to be parameter, statistic, census or none of these.

(b) Identify the following data to be nominal, ordinal, interval or ratio.

i) Standard & Poor's bond ratings AAA, AA, A, BBB, BB, B, CCC, CC, C, DDD, DD, D

ii) Standardised exam score such as SAT, GRE, GMAT, ATAR, etc.

(c) You are supplied with 100 fruit seedlings. You randomly plant them in 10 rows with equal spaces between them and equal row lengths. Next you decide to check a sample of the plants for fungal disease. You pick your sample as the first plant in each row. What kind of sampling have you done (simple random sampling, stratified sampling, systematic sampling or cluster sampling)?

Reference no: EM132006961

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